WIRELESS NETWORK

Presented by :- VARSHA AGARWAL

HIMANSHI BHARGAVA VARSHA BABANI

SHIVANI JAIN

BCA PART II

Contents:Wireless Network

Wi-Fi IntroductionAdvantagesWorking

Li-Fi IntroductionPast and Present ImportanceWorking Applications

Gi-Fi IntroductionGi-Fi chipFeaturesApplicationsFuture

A wireless network is any type of computer network that transmit data from one node to another wirelessly. It was first introduced in 1901.

Wi-Fi is a popular technology that allows an electronic device to exchange data or connect to the internet wirelessly using Radio Waves.Wi-Fi Alliance define wi-fi as any Wireless Local Area Network (WLAN).

The main aims of Wi-Fi are the following:•make access to information easier • ensure compatibility and co-existence of devices • eliminate complex cabling• eliminate switches, adapters, plugs, pins and connectors

Wireless Fidelity (Wi-Fi)

Working of Wi-Fi

AdvantagesMobilityEase of InstallationFlexibility

CostUse unlicensed part of the radio spectrumEfficiency

Speed

Light Fidelity (Li-Fi) LI-FI is transmission of data through illumination, i.e. sending data through a LED light bulb that varies in intensity faster than human eye can follow.

LI-FI can be thought of as a light based Wi-Fi, that is it uses light instead of radio waves to transmit information. And instead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information.

This brilliant idea was first showcased by Harald Haas from University of Edinburgh, UK, in his TED Global talks on VLC.The technology truly began during the1990’s in countries like Germany, Korea, and Japan where they discovered LED’s could be retrofitted to send information.Harald Haas continues to wow the world with The potential to use light for communication.

Past and Present of Li-fi

Importance of Li-FiInstead of Wi-Fi modems, Li-Fi would use transceiver-fitted LED lamps that can light a room as well as transmit and receive information.This technology uses a part of the electromagnetic spectrum that is still not greatly utilized- The Visible Spectrum .It is possible to encode data in the light by varying the rate at which the LEDs flicker on and off to give different strings of 1 s and 0 s. The LED intensity is modulated so rapidly that human eyes cannot notice, so the output appears constant.It is capable of transmitting data at 100 MB/s - faster than most UK broadband connections. Li-Fi.-as it has been dubbed, has already achieved high speeds in the lab. Researchers at the Heinrich Hertz institute in Berlin, Germany, have reached data rates of over 500 megabytes per second using a standard white-light LED.

Transmission of data through LEDs

Applications of Li-FiIt can be used in the place where it is difficult to lay the optical fiber like hospitals. In operation theatre, LI-FI can be used for modern medical instruments.In aircraft, LI-FI can be used for data communication.It can be used in chemical or petroleum plants where other transmission or frequencies could be hazardous.Thousands and millions of street lamps can be transferred to Li-fi lamps to transfer data.

Gigabit Wireless (Gi-Fi)Gi-Fi or Gigabit Wireless is the world’s first transceiverintegrated on a single chip that operates at 60GHz on theCMOS (complementary metal–oxide–semiconductor) process.

It will allow wireless transfer of audio and video data upto 5 gigabits per second, ten times the current maximumwireless transfer rate, at one-tenth of the cost, usually within a range of 10 meters .

It utilizes a 5mm square chip and a 1mm wide antenna burning less than 2milli watts of power to transmit data wirelessly over short distances

The Nitro chipset in Gi-Fi technology by offering reduced size and power consumption, can be used to send and receive large amounts of data in a variety of applications, it is able to transfer gigabits of data within seconds and therefore it can be used for huge data file transmission and it is expected that this chipset replaces HDMI (High-Definition Multimedia Interface) cables and could develop wireless home and office of future.

Gi-Fi Chip

It could theoretically transfer an HD movie to a cell phone in seconds, the researchers claim .

The size of the Gi-Fi chip is 5×5 millimeter and can be placed in different devices such as mobile phones.

High speed of data transfer

Features of Gi-Fi

Low power consumptionHigh securityCost effectiveSmall sizeQuick deploymentHighly portable, high mobility

1. Household appliances :

It makes the wireless home and office of the future.

Applications of Gi-Fi

2. Office appliances : As it transfers data at high speeds that made work very easy .3. Video information transfer:

We can transfer at a speed of gbps.

With growing consumer adoption of High-Definition (HD) television, low cost chip and other interesting features of this new technology it can be predicted that the anticipated worldwide market for this technology is vast.

Within next few years, we expect Gi-Fi to be the dominant technology for wireless networking.

By providing low-cost, high broadband access, with very high speed large files swapped within seconds it could develop wireless home and office of future.

Future of Gi-Fi

Conclusion..............

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